Buying new clothes so that your friends will stop making fun of your old clothes a positive reinforcement or negative reinforcement?

Which of the following contributed most to making the items listed in the box

Psychologists studying infant memory want to determine at what age babies can remember specific events. an experimenter uses several puppets to demonstrate a series of actions while the infant watches. after a delay, the experimenter records how many of the actions the child imitates when playing with the puppets. what is the dependent variable?

The renting agent says i have to rent for at least one year. but i’m not sure how many months i’ll be in town.